CyberCertPrepNetwork FundamentalsOSI & TCP/IP ModelsEASYFree question
In the TCP/IP model, which layer handles the physical transmission of bits on the wire, including voltage levels, cable specifications, and connector types?
- A.Network Access layer (Link layer)
- B.Transport layer
- C.Internet layer
- D.Application layer
Why A is correct
The TCP/IP Network Access layer (Link layer) corresponds to OSI Layers 1 and 2. It handles physical transmission (voltage, signaling, cable types - OSI Layer 1) AND frame delivery, MAC addressing, and error detection using FCS (OSI Layer 2). Standards like 802.3 (Ethernet) and 802.11 (Wi-Fi) define both the physical and data-link aspects at this layer.
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